Rihanna is having a sexy holiday! The “S&M” singer showed up at London’s O2 Arena for the 2011 Jingle Ball this past weekend. Dressed in a blonde bob wig (reminiscent of Julia Roberts‘ ‘do in Pretty Woman) and a pair of short-shorts and a houndstooth train, RiRi performed all her hits! Rihanna tweeted: “I sell out ARENAS….I call…Read more»